Array GPR system “Yakumo” and its applications

摘要

We have developed a multistatic GPR system “Yakumo”. “Yakumo” is equipped with 8-channel transmitter and receiver antennas, and has 2m width and operates at 50MHz-1.5GHz. It can acquire GPR data rapidly, and we have applied it to large scale GPR surveys, which include archaeological survey and Tsunami victims survey. Yakumo can obtain precise 3D GPR images using its multi-static antenna arrangement. We demonstrated that Yakumo can effectively detect objects buried 50cm-1m in sand. The Yakumo system can also be used for CMP analysis, then vertical velocity profile can be obtained along with the conventional common offset data. We tested the estimation of vertical velocity profile in the test pavement, and we could demonstrated that we can see the structure very clearly.